<template>
  <div>
    <h2>必须加入key的情况</h2>
    <ul>
      <li v-for="item in list" :key="item.id">
        <input type="checkbox">
        {{item.id}}--{{item.name}}
        <button @click="del(item.id)">删除</button>
        </li>
    </ul>
  </div>
</template>

<script>
export default {
data() {
    return {
      list: [
        { id: 200, name: '宋江',},
        { id: 400, name: '吴用',},
        { id: 528, name: '林冲',}
      ]
    }
  }
}
</script>

<style>

</style>
